DTC P0703: Brake Switch B Input Circuit

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Mariner, and 2006 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

P0703 - BRAKE SWITCH B INPUT CIRCUIT

Description:	Indicates the powertrain control module (PCM) did not receive a brake pedal position (BPP) input.
Possible Causes:	Open or short in the BPP circuit Open or short in the stoplamp circuits Damage in module(s) connected to the BPP circuit. Damaged brake switch Misadjusted brake switch
Diagnostic Aids:	Check for proper function of the stoplamps. Using a diagnostic tool, check the BPP PID. The stoplamps and PID should toggle on and off with brake pedal activation.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Freestar/Monterey, Town Car	Verify the brake pedal was applied and released during the key on engine running (KOER) selftest. For additional concerns, refer to the appropriate EXTERIOR LIGHTING article .
Expedition, Navigator	Verify the brake pedal was applied and released during the key on engine running (KOER) selftest. For additional concerns, refer to the appropriate VEHICLE DYNAMIC SYSTEMS article .
All others	GO to Pinpoint Test FD .